Percentage Calculator

This percentage calculator helps you solve various percentage problems. You can find what percentage one number is of another, calculate percentage increases or decreases, or find the result of adding or subtracting a percentage from a number.

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How the Percentage Calculator Works

Percentage of a Number

To find what percentage of a number is another number:

Result = (Percentage × Number) ÷ 100

Example: 25% of 100 = (25 × 100) ÷ 100 = 25

Percentage Change

To find the percentage change between two values:

Percentage Change = ((New Value - Original Value) ÷ Original Value) × 100

Example: Change from 100 to 125 = ((125 - 100) ÷ 100) × 100 = 25% increase

Percentage Difference

To find the percentage difference between two values:

Percentage Difference = (|Value1 - Value2| ÷ ((Value1 + Value2) ÷ 2)) × 100

Example: Difference between 50 and 100 = (|50 - 100| ÷ ((50 + 100) ÷ 2)) × 100 = 66.67%

Note: The percentage difference formula uses the average of the two values as the reference point, making it useful for comparing two values without designating one as the "original" value.